We can provide one of these two alternatives to our customers for Manufacturer Caddock Electronics Inc.’s part number MP850-100-1%, DK# MP850-100-F-ND as 100 Ohms ±1% 50W Through Hole Resistor TO-220-2 Full Pack Moisture Resistant, Non-Inductive Thick Film - that is non-stocking:
PWR221T-50-1000F as RES 100 OHM 1% 50W TO220 from Bourns Inc.
or
LTO050F100R0FTE3 as RES 100 OHM 50W 1% TO220 from Vishay Sfernice
Please review the datasheets to ensure the alternative will work for your application.